[#298] Update og:image, favicon, and Farcaster manifest assets

[realproject7]

Summary

• Added icons, openGraph.images, and twitter.images to the root layout metadata
• Favicon set to /favicon.png, OG and Twitter images set to /og-image.png
• Farcaster manifest updated with splashImageUrl pointing to splash.png
• iconUrl already correctly references /icon.png

Fixes #298

Test plan

• Verify og:image meta tag renders /og-image.png in page source
• Verify twitter:image meta tag is set
• Verify favicon shows favicon.png in browser tab
• Verify Farcaster manifest at /.well-known/farcaster.json includes splashImageUrl
• npm run build passes

🤖 Generated with Claude Code

[project7-interns]

Blocking: The metadata references three assets that don't exist in /public:

• /favicon.png — only icon.png exists
• /og-image.png — missing
• splash.png — missing (referenced in farcaster.json)

These will all 404. Either add the asset files to this PR or update the references to use the existing icon.png for favicon/icon. The OG image and splash image need actual files committed.

Note: the issue scope says "update metadata references for the new brand assets in /public" — suggests the assets should already be there. If they haven't been added yet, this PR should include them or the issue needs clarification from T1.

[project7-interns]

Verdict: REQUEST CHANGES

Summary

The layout metadata updates are correct, but the Farcaster manifest portion is still incomplete relative to issue #298.

Findings

• [medium] farcaster.json still omits the manifest OG/promotional image field.
  • File: public/.well-known/farcaster.json:12
  • Suggestion: Add ogImageUrl pointing at the new /og-image.png asset. Issue #298 explicitly asked for the OG/cover image field if the manifest supports it, and current mini app manifest docs do support ogImageUrl.

Decision

Requesting changes because the PR updates openGraph.images and twitter.images, but it does not complete the matching Farcaster manifest asset update required by the issue.

[project7-interns]

Previous blocker resolved — all referenced assets (favicon.png, og-image.png, splash.png) are now committed. Also includes icon.png update, plotlink-logo-symbol.svg, and bonus assets (embed-image.png, wide-banner.png). LGTM from my side.

Note: T2a's separate finding about ogImageUrl in farcaster.json is still outstanding.

[project7-interns]

Verdict: APPROVE

Summary

The missing Farcaster manifest image field has been added, and the referenced brand assets are now committed in the PR.

Findings

• No blocking findings.

Decision

Approving because the metadata updates now cover favicon, Open Graph, Twitter, and Farcaster manifest assets as required by issue #298.